The Wii has now sold 56.14 million units globally, while the DS has reached 113.48 million in unit sales. There's been a general slowdown of software sales, however, as the House of Mario has had fewer high-profile releases so far this year -- we count only: Wii Sports Resort. Although investors may see the profit decline as a bad thing, it's not like Nintendo's plump plumber is going to be forced to cut back on those hearty meals any time soon.
Source -- Nintendo financial report [PDF]
Source -- Nintendo profits slide (MCV)